Sheave block



SHEAVE BLOCK April 14, 1931.

Filed March 18, 1929 2 Sheets-Sheet I INVENTOR A. C. PATTON SHEAVE BLOCK April 14, 1931.

Filed March 18, 1929 2 Sheets-Sheet 2 Z a Z 2 6 6 Z X.\

V o o.

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fl/fie/f 6 7 07/00 INVENTOR ATTORNE Patented Apr. 14, 1931 .TA ES FATE? FFEE SHEAVE BLOCK Application filed March 18, 1929.

My invention is primarily intended for use in logging equipment and especially for use in the heavy duty logging equipment where heavy cables and lines are being worked under great stresses and where heavy duty, large diameter, free rolling sheaves, are to he placed within the block sides, construction being utilized to create a block of minimum weight.

In the heavy logging operations of the western part of the United States and in Western Canada, extremely large logs are being handled which require extremely heavy operating logging rigging. In such operations the blocks, many times, attain tremendous wei hts and the handling and the placing of the same becomes a'most difficult operation. In addition to the handling of he heavy blocks the maintaining of the same in suitable operating condition is difficult and especially so when they are dragged and handled under adverse operating conditions and where lines and wire ropes are being passed through the blocks that are covered with mud and grit. The deterioration of the blocks and the inefficient operation of the same creates great economic loss.

In my new and improved construction, I form my blocks so as to give a minimum of weight of the block and at the same time create a sheave block having a maximum of diameter of the sheave over which the wire rope passes.

The longevity of the rope somewhat de pends upon the diameter of the sheave block about which the wire rope is operated and the larger the wire rope in diameter, the larger the sheave must be.

In my new and improved construction, I place within the block sides an inner stationary frictionless ball bearing race-way that is fixedly secured to the block sides and place a sheave rim within the block side that engages and rolls upon the ball bearings disposed on its inner race-way surface; means being provided within the block sides adapted for preventing the admission of grit anc other substances within the ball bearing structure.

A further object of my invention is to pro- Serial No. 348,027.

vide means for the lubricating of the hearing from a central greasing cylinder disposed within the block sides.

A further object resides in the construction that results in a rigid block that will remain in a suitable operating condition over a relatively long operating period with a minimum of alteration adjustment and repair and with a relatively free operating condition being developed within the block.

With these and incidental objects in view the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims, and a preferred form of embodiment of which is here inafter shown with reference to the drawings which accompany and form a part of this specification.

In the drawings:

Fig. l is a side view of the assembled block.

Fig. 2 is a cross sectional -iew, taken on line 22 of Fig. 1 looking in the direction indicated.

Fig. 3 is a longitudinal, sectional view, taken on line 33 of Fig. 2, looking in the direction indicated.

Fig. 4 is a front view, partically in section, of a fabricated block made more particularly to illustrate a preferred means of lubricating the structure.

Fig. 5 is a fragmentary, sectional, side view of the lubricating elements disposed central of the block.

Fig. 6 is a fragmentary, side view as illustrated in Fig. 4c, the same being taken on line 66 of Fig. 4:, looking in the direction indicated.

Fig. 7 is a fragmentary, sectional, side view of the engaging ball bearing sheave rim and race and illustrating means disposed within the block sides for preventing the admission of grit and the like within the ball race-ways.

Like reference characters refer to like parts throughout the several views.

I preferably form the block, as illustrated in Figs. 1, 2 and 3 wherein the block is composed of side walls 1 and 2, having upwardly extending ears 3 and 4, and having a 7 terial from the; cylinder to the interijor of shackle removably secured to the block side two parts 7 and 8 is disposed upon the shoulmembers. Theside blocks have central aligned openings 6. Retaining-shoulders 9 and 10 inwardly eXtend from the side blocks. A split ball bearing race-way composed of ders 9 and 10 disposed within the side walls of theblo'ck sides'upon which the inner raceways 7 and-8 rest. A plurality ofbolt openings are disposed in registerable alignment through the block sides adaptedtohaere bolts 11 disposed therein. Depressions are formed within the block sides about the outer periphery of each boltop'ening in order to keep the bolt'heads and fastening'means, such' as Way. Aball bearing retainingringfil is dis} 'posedbetween the inner and outerrace-ways and maintains the ball bearings 1n spacedrelationship with each other. A rim13 is. dis posedwithin the -side wall members of the block sides, having a race-way .disposedupon its inner periphery into whichtheba'll bearings operate. Ou'twardly extending cheeks 1d and 15 are disposed alt-either side of the block sides/and extend inwardly therefrom to form; annular grooves 16, and '17 within the inner surface of thelblocli sides against whichthe outerside wallsof thejrim 13 are 7 disposed. Inwardly extending annular lips 18 and 19 aredispofsed upon the inner side of each of 'the block sides to engage within an annular groove disposedfwithin the rim 13. The purpose of the-annular lips isto prevent theadmission of grit within the ball bearings; The, centrifugal force created by theiveloc'ity of the sheave rim'tendsfto p,re-'

ven'tthe accumulation ofgritwithin the'hous ingfor the ball, bearings. Pressure 1 grease cups 20-are disposed at the inner periphery of the inner race-ways for facilitatingthe admissi'onof lubricating grease under pressure withln'the race-ways; in the larger s zes-oi blocks the side walls 21 mass have ai'l'ubrieating cylinder 23 secured to one ofthefside wailsjoit the block sideand a threaded stein 24 is disposed within the cylinder 23 into which the piston 25 is reciprocably disposed V bythe threading ofthe 'stemfthrough" the piston. Lubricating niaterial is placed within the cylinder 23 and is exudedjtherefroi'n by the movement 'ofthe' piston. The piston isinoved longitudinally ofthe cylinder by the outwardly extending head *26 into which asultable jwrenchinay be placed for actuatto be understood that it is notintended to conhnestheunventaonto the one'form of embodiment herein shownand described, as it i's s'usceptible of embodiment in various forms all comingg within the scopelof the claims whichffollowk nuts, confined within the same, suriace plane V as that "of the side blocks, A plurality of ball I bearings 12' are disposed within the race What Iclaim is: I it 1, A ball "bearing block comprising com;

panion block sides, retaining shoulder in;

wardly extending from each ofthe block sides, asplit inner raceway, each part being disposed about the shoulder, a sheave ring having a groove raceway disposed within its inner surface being disposed 'between the companion block sides, an annular ball bearing ring disposed betweenthe -inner raceway andsheave ring, anda plurality ofballbear;

ingsdisposed. Withinfthe annular retaining i ring and being disposed between the sheave ring and-theinner raceway.

i 2. A ball bearing block comp-rising com panion block sides each "having central I cut out sections disposedpthere-through} and depressionsdisposed on the outside thereof, bolt openings disposed through the, block sides within the depressions, oppositely disposed complementary shouldersextending inward.- 7

1y from each of'the block-sidesuan inner. split race-way disposed about 'said shoulders, hav? ing central cut-out sectionsgsdirectly aligned with the'central cut out-sections Within the lock sides, bolt openings disposed through said inner split. race-way. 1n-registerable alignment. with the '.-openings disposed through the block sides, through bolts disposed through the openingsand securingthe inner racerway and the side, blocks rigidly together, the bolts being maintained; flush with the outer surface of the side blocks with the heads and nuts ol tlie bolts being-dis posed within the depress ons, a sheaye-ring having a groovedisposed in itsinner periphery disposed between; the block, sides, a, ball bearing :retaining ring disposed betweenthe innerjr ace-way 'and'sheave ring, and ball bearings disposed within the 1 retaining ring.

' ALBER-T G'..PATTON."

ing thethreaded stem; "A plurality offpipes 27 extend outwardly 'from'the' head fzeof the cylinder and conduct the lubricating 1'na-' the race-way in w-hich'the ball bearings are disposed; The'cylinder'23 ismaiiitainedand protected within the space disposed Within thefblock sides, as illustratedin "In I 

